http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-381817-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-672 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-672 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-16 |
| filingDate | 1970-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-11-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-381817-A1 |
| titleOfInvention | A PROCEDURE FOR THE PREPARATION OF A SEGMENTED COPOLIESTER THERMOPLASTIC ELASTOMER. |
| abstract | A process for the preparation of a copolyester segmented thermoplastic elastomer, comprising a multiplicity of periodic, intralinear, long-chain ester units derived from a dicarboxylic acid or its ester-forming equivalents and a long-chain glycol or its ester-forming equivalents, and short-chain ester units derived from a dicarboxylic acid or its ester-forming equivalents and a low-molecular-weight diol or its ester-forming equivalents, said ester units being attached in a tail-to-tail fashion through of ester bonds, whose procedure is characterized by reacting (A) one or more dicarboxylic acids with a molecular weight less than 300 or their ester-forming equivalents, (B) one or more low molecular weight diols, with a molecular weight less than 250 or their ester forming equivalents and (C) one or more long-chain glycols with a molecular weight of approximately 600-6000 and a carbon to oxygen ratio greater than 2.5 or their ester-forming equivalents, to form said polyester, provided that (a) when an aliphatic dicarboxylic acid or its equivalent is used, ethylene glycol is not used as a low molecular weight diol, (b) the total number of different dicarboxylic acids or their equivalents plus that of low molecular weight diols or their reactive equivalents must be at least 3 and (c) the reactants and their proportions are selected such that: (i) the short chain ester units of said copolyester derived from reagents (A) and (B) constitute 30 to 60% by weight of the total copolymer, (ii) from 50 to 90% of the total number of said short chain ester units contained in said copolymer are identical, that is, they are derived from a single dicarboxylic acid or its equivalent and a single low molecular weight diol or its equivalent, (iii) a homopolymer in the range of fiber-forming molecular weights, obtained from diol identical ester units, has a melting point greater than 174ºC and (iiii) a copolymer in the range of fiber-forming molecular weights, obtained exclusively from the total of short-chain ester units, has a melting point of less than 200ºC. (Machine-translation by Google Translate, not legally binding) |
| priorityDate | 1969-07-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 20.